Modified equation for storage coefficient from time drawdown graphs Calculator

✖The Transmissivity refers to the measure of how much water can be transmitted horizontally through an aquifer is the product of the hydraulic conductivity of the aquifer and its saturated thickness.ⓘ Transmissivity [τ]			+10% -10%
✖Time at the Point of Intersection between Straight Line and Zero-drawdown Line.ⓘ Time at the Point of Intersection [t_o]			+10% -10%
✖Distance from Pumping Well to the point where drawdown occurs.ⓘ Distance from Pumping Well [r]			+10% -10%

✖Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer.ⓘ Modified equation for storage coefficient from time drawdown graphs [S]

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Modified equation for storage coefficient from time drawdown graphs Solution

STEP 0: Pre-Calculation Summary

Formula Used

Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2)
S = (τ*t_o)/(640*r^2)
This formula uses 4 Variables

Variables Used

Storage Coefficient - Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer.
Transmissivity - (Measured in Square Meter per Second) - The Transmissivity refers to the measure of how much water can be transmitted horizontally through an aquifer is the product of the hydraulic conductivity of the aquifer and its saturated thickness.
Time at the Point of Intersection - (Measured in Minute) - Time at the Point of Intersection between Straight Line and Zero-drawdown Line.
Distance from Pumping Well - (Measured in Meter) - Distance from Pumping Well to the point where drawdown occurs.

STEP 1: Convert Input(s) to Base Unit

Transmissivity: 1.4 Square Meter per Second --> 1.4 Square Meter per Second No Conversion Required
Time at the Point of Intersection: 120 Minute --> 120 Minute No Conversion Required
Distance from Pumping Well: 3 Meter --> 3 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

S = (τ*t_o)/(640*r^2) --> (1.4*120)/(640*3^2)

Evaluating ... ...

S = 0.0291666666666667

STEP 3: Convert Result to Output's Unit

0.0291666666666667 --> No Conversion Required

FINAL ANSWER

0.0291666666666667 ≈ 0.029167 <-- Storage Coefficient

(Calculation completed in 00.020 seconds)

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< Time Drawdown Analysis Calculators

Time at which Steady Shape Conditions Develop

LaTeX Go Time at Which Steady-shape Conditions Develop = (7200*Distance from Pumping Well^2*Storage Coefficient)/Transmissivity

Storage Coefficient given time at which Steady Shape conditions develops

LaTeX Go Storage Coefficient = Transmissivity*Time at Which Steady-shape Conditions Develop/7200*Distance from Pumping Well^2

Transmissivity derived from time drawdown graphs

LaTeX Go Transmissivity = (2.3*Pumping Rate)/(4*pi*Drawdown Across One Log Cycle)

Equation for pumping rate of transmissivity from time drawdown graphs

LaTeX Go Pumping Rate = (Transmissivity*4*pi*Drawdown Across Log Cycle)/2.3

Modified equation for storage coefficient from time drawdown graphs Formula

LaTeX Go

Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2)
S = (τ*t_o)/(640*r^2)

What is Storativity?

Storativity or the Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer. Storativity is a dimensionless quantity, and is always greater than 0.

How to Calculate Modified equation for storage coefficient from time drawdown graphs?

Modified equation for storage coefficient from time drawdown graphs calculator uses Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2) to calculate the Storage Coefficient, The Modified equation for storage coefficient from time drawdown graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head. Storage Coefficient is denoted by S symbol.

How to calculate Modified equation for storage coefficient from time drawdown graphs using this online calculator? To use this online calculator for Modified equation for storage coefficient from time drawdown graphs, enter Transmissivity (τ), Time at the Point of Intersection (t_o) & Distance from Pumping Well (r) and hit the calculate button. Here is how the Modified equation for storage coefficient from time drawdown graphs calculation can be explained with given input values -> 0.029167 = (1.4*7200)/(640*3^2).

FAQ

What is Modified equation for storage coefficient from time drawdown graphs?

The Modified equation for storage coefficient from time drawdown graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head and is represented as S = (τ*t_o)/(640*r^2) or Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2). The Transmissivity refers to the measure of how much water can be transmitted horizontally through an aquifer is the product of the hydraulic conductivity of the aquifer and its saturated thickness, Time at the Point of Intersection between Straight Line and Zero-drawdown Line & Distance from Pumping Well to the point where drawdown occurs.

How to calculate Modified equation for storage coefficient from time drawdown graphs?

The Modified equation for storage coefficient from time drawdown graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head is calculated using Storage Coefficient = (Transmissivity*Time at the Point of Intersection)/(640*Distance from Pumping Well^2). To calculate Modified equation for storage coefficient from time drawdown graphs, you need Transmissivity (τ), Time at the Point of Intersection (t_o) & Distance from Pumping Well (r). With our tool, you need to enter the respective value for Transmissivity, Time at the Point of Intersection & Distance from Pumping Well and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Storage Coefficient?

In this formula, Storage Coefficient uses Transmissivity, Time at the Point of Intersection & Distance from Pumping Well. We can use 1 other way(s) to calculate the same, which is/are as follows -

Storage Coefficient = Transmissivity*Time at Which Steady-shape Conditions Develop/7200*Distance from Pumping Well^2

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